1,Breathe cleaner air: This personal air freshener will release more than 120 million negative ions, pushing pollutants away from your personal space, eliminating most smoke, cooking odors, and even PM2.5 air pollutants, thereby improving mood and Sleep.2,Take it with you: Because this mini air purifier comes with a Lanyard,it can be worn around the neck. During the journey, in public places or other places with poor air quality, wearing this kind of clothing can create a fresh air area.3,Easy to use: easy to operate, just press the simple operation to enjoy the fresh air.4,Long-lasting: The portable air purifier has a USB charging port that can be charged compatible with 2-3 hour and can be used compatible with about 31-62 hours to ensure fresh air5,No need to replace consumables, silent operation, suitable compatible with various scenes, adjustable gears, switch according to different environmentsProduct category: hanging neck air purifierUsing voltage: DC5VPower: Less than 1WCurrent: Less than 50mARated frequency: 50 (HZ)Battery capacity: 800mahTwo levels of negative ion concentration adjustable: 80 million/cm3, 120 million/cm3Charging time: 2-3 hoursUse time: 31 hours compatible with high concentration, 62hours compatible with low concentrationCharging method: Type-C chargingControl method: push-buttonNoise: 20 (dB)Working principle: negative ionSuggested use area: 10 ()Product size: 76.6x34 .6x17.6mmMaterial:ABS+PCcolour:BlackPackage Contents:1 x Air purifier (including Lanyard)1 x charging cable1 x Storage bag1 x Chinese and English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.